html, body {
    background-color: #fff;
    height: 100%;
    margin: 0;
}

body {
    align-items: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 20px;
}

canvas {
    display: block;
    height: auto;
    max-width: 100%;
    width: 940px;
}
